5 Must-Have Features in a fiber optic intrusion detection system

What is Liminal-F?

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This advanced perimeter intrusion detection system operates based on the detection of light signal interruptions traveling through optical fibres. These fibres can be conveniently installed on walls, fences, or even underground.

What’s more?

The durability of these optical fibres is remarkable; they remain functional despite exposure to sunlight, high temperatures, moisture, and dust, making them exceptionally reliable in varying environmental conditions.

Having established the basics, let’s dive into the technical details. FO-PIDS are classified as electrically passive sensors since they do not carry electrical currents. This characteristic provides immunity to both Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI).

Essentially, FO-PIDS utilizes optical fiber as its core sensing component, sending an optical beam through it. Intelligent signal processing algorithms, coupled with advanced electronics, detect any interference in the optical beam that occurs from attempted intrusions, whether from climbing, cutting, or tunneling underneath fences or walls.

The system promptly generates alarms and warnings to alert authorities about intrusion attempts and their precise locations within the protected area.

Let’s examine this innovative Perimeter Intrusion Detection System more closely!

Intrusion Detection Capability of Liminal-F

The Liminal-F Fiber Optic based Perimeter Intrusion Detection System is engineered to identify nearly all forms of intrusion attempts, including but not limited to:

• Climbing over the fence, wall, or pole
• Using a step ladder to scale the fence or wall
• Cutting or tearing down the fence
• Tampering with the fence or alarm host
• Digging a tunnel beneath the fence or wall
• Cutting through the fiber itself

Moreover, it effectively detects external activities near the fence such as running, brisk walking, vehicle passage, or even tree cutting.

Features of Liminal-F

Rapid Detection

The Liminal-F Fiber Optic based Perimeter Intrusion Detection System registers vibrations transferred to the fiber due to any motion or pressure changes nearby. It processes these changes through intelligent algorithms integrated within the device and associated management software. Notably, a single-mode fiber is employed in the Liminal-F system for both communication and detection.

Zone-Based Distributed Sensor System

This system allows perimeter delineation into manageable zones of up to 1,500 meters each. A single hardware setup can supervise up to 16 zones, all controllable via one instance of management software.

Dry Contact Alarm Output (NO/NC)

Equipped with NO/NC dry contacts, the system seamlessly integrates with a variety of security devices. It can connect to external alarms or surveillance systems. When an intruder or tampering signal is identified, the Liminal-F communication and monitoring unit will activate the respective tasks using the NO/NC contacts.

Environmentally Sustainable and Cost-Effective

The Liminal-F Intrusion Detection System uses a passive sensor configuration that does not depend on a power supply in the field, rendering it not only environmentally sustainable but also considerably cost-effective for operations.

Applications of Liminal-F

The Liminal-F Fiber Optic based Perimeter Intrusion Detection System is ideal for monitoring areas requiring high security, including:

• Homeland Security (HLS)
• International Borders
• Military Bases
• Airports
• Solar Energy Facilities
• Oil Refineries
• Critical Infrastructure
• Correctional Facilities
• VIP Locations
• Luxury Hotels/Resorts
• Reservoirs/Nature Parks/Wildlife Sanctuaries

Control Software Attributes of Liminal-F

The Liminal-F system includes dedicated software for operation, zone management, and alarm monitoring, ensuring real-time alerts for any intrusion attempts. The Alarm Handling software centralizes operations across various devices on a LAN network. This allows control over:

• Zone Marking
• Activation and Control
• Uploading Offline Maps
• Visual and Audio Alarm Generation
• Maintaining Alarm Logs
• Managing Alarm Software Attributes

Alarm Triggers of Liminal-F

Alarms are triggered by the following events:

• Intrusion
• Fiber Break
• Tampering
• Power Loss

Alarm Devices

Depending on your requirements, preferences, and budget, you can select either one or more alarm devices to enhance your security:

• LED/Strobe Lights
• Siren
• Software-Based Audio Visual Alarms

Liminal-F Variants

Liminal-F is available in two variants based on sensor size and application:

Liminal-F DZ

This compact system is suitable for two zones and is enclosed in an IP-67 graded casing, making it mountable directly on fences or walls.

Liminal-F MZ

This modular design fits standard 19-inch 4u racks with multiple slots for additional cards. A single unit supporting 8 pairs of optical transmitters and receivers can monitor up to 16 zones, with add-on cards required for monitoring fewer zones.

What Do You Get?